<template>
  <view class="uni-navbar">
    <view
      :class="{'uni-navbar--fixed': fixed,'uni-navbar--border':border}"
      :style="{'background-color':backgroundColor}"
      class="uni-navbar__content"
    >
      <!-- 'uni-navbar--shadow':border, -->
      <uni-status-bar v-if="statusBar" />
      <view :style="{color:color}" class="uni-navbar__header uni-navbar__content_view">
        <view class="uni-navbar__header-btns uni-navbar__content_view" @tap="onClickLeft">
          <view v-if="leftIcon.length" class="uni-navbar__content_view">
            <tui-icon :name="leftIcon" :color="color" size="24" />
          </view>
          <view
            v-if="leftText.length"
            :class="{'uni-navbar-btn-icon-left':!leftIcon.length}"
            class="uni-navbar-btn-text uni-navbar__content_view"
          >{{ leftText }}</view>
          <slot name="left" />
        </view>
        <view class="uni-navbar__header-container uni-navbar__content_view">
          <view
            v-if="title.length"
            class="uni-navbar__header-container-inner uni-navbar__content_view"
          >{{ title }}</view>
          <!-- 标题插槽 -->
          <slot />
        </view>
        <view class="uni-navbar__header-btns uni-navbar__content_view" @tap="onClickRight">
          <view v-if="rightIcon.length" class="uni-navbar__content_view">
            <tui-icon :name="rightIcon" :color="color" size="24" />
          </view>
          <!-- 优先显示图标 -->
          <view
            v-if="rightText.length&&!rightIcon.length"
            class="uni-navbar-btn-text uni-navbar__content_view"
          >{{ rightText }}</view>
          <slot name="right" />
        </view>
      </view>
    </view>
    <view v-if="fixed" class="uni-navbar__placeholder">
      <uni-status-bar v-if="statusBar" />
      <view class="uni-navbar__placeholder-view" />
    </view>
  </view>
</template>

<script>
import uniStatusBar from "../uni-status-bar/uni-status-bar.vue";
import tuiIcon from "@/components/icon/icon.vue";

export default {
  name: "UniNavBar",
  components: {
    uniStatusBar,
    tuiIcon
  },
  props: {
    title: {
      type: String,
      default: ""
    },
    leftText: {
      type: String,
      default: ""
    },
    rightText: {
      type: String,
      default: ""
    },
    leftIcon: {
      type: String,
      default: ""
    },
    rightIcon: {
      type: String,
      default: ""
    },
    fixed: {
      type: [Boolean, String],
      default: false
    },
    color: {
      type: String,
      default: "#000000"
    },
    backgroundColor: {
      type: String,
      default: "#FFFFFF"
    },
    statusBar: {
      type: [Boolean, String],
      default: false
    },
    shadow: {
      type: [String, Boolean],
      default: true
    },
    border: {
      type: [String, Boolean],
      default: true
    }
  },
  methods: {
    onClickLeft() {
      this.$emit("click-left");
    },
    onClickRight() {
      this.$emit("click-right");
    }
  }
};
</script>

<style>
@charset "UTF-8";

.uni-navbar__content {
  display: block;
  position: relative;
  width: 100%;
  background-color: #fff;
  overflow: hidden;
}

.uni-navbar__content .uni-navbar__content_view {
  display: flex;
  align-items: center;
}

.uni-navbar__header {
  display: flex;
  flex-direction: row;
  width: 100%;
  height: 44px;
  line-height: 44px;
  font-size: 16px;
}

.uni-navbar__header-btns {
  display: inline-flex;
  flex-wrap: nowrap;
  flex-shrink: 0;
  width: 120upx;
  padding: 0 12upx;
}

.uni-navbar__header-btns:first-child {
  padding-left: 0;
}

.uni-navbar__header-btns:last-child {
  width: 60upx;
}

.uni-navbar__header-container {
  width: 100%;
  margin: 0 10upx;
}

.uni-navbar__header-container-inner {
  width: 100%;
  display: flex;
  justify-content: center;
  font-size: 30upx;
  padding-right: 60upx;
  white-space: nowrap;
}

.uni-navbar__placeholder-view {
  height: 44px;
}

.uni-navbar--fixed {
  position: fixed;
  z-index: 998;
}

.uni-navbar--shadow {
  box-shadow: 0 1rpx 6rpx #ccc;
}

.uni-navbar--border:after {
  position: absolute;
  z-index: 3;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1rpx;
  content: "";
  -webkit-transform: scaleY(0.5);
  transform: scaleY(0.5);
  background-color: #c8c7cc;
}
</style>